Tool for shaping valve-seats.



s. H. JOHNSEN. TOOL FOR SHAPING VALVE SEATS.

APPLICATION FILED AUG.30, I915. I

Patented June 6, 1916.

2 SHEETSSHEET1 wot/"@164 S..H.IJOHNSEN.

TOOL FOR SHAPING VALVE SEATS. I

APPLICATION FILED Aua.30. 1915.

1 1 86,403; I Patented June 6, 1916.

2 SHEETS-SHEET 2.

i6 is i v s j 'wdfldaim SIG-URD HALVDAN JOHNSEN, OF NEW YORK, N. Y.

TOOL FOR SHAPING VALVE-SEATS.

Specification of Letters Patent.

Patented June 6, 191a.

Application filed August 30, 1915. Serial No. 48,059. H v

To all whom it may concern:

Be it known that I, Srcunn H. JoHNsnN,

a citizen of Norway, residing at New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Tools for Shaping Valve-Seats; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates broadly to'improvements in devices for grinding valve seats,

and more particularly to those designed.

primarily for use upon the seats of puppetvalves. 2

The object of the invention is to provide a device of the class specified which although being comparatively simple and inexpensive,

will be highly eiiicient and durable and will possess a number of advantageous characteristics.

With this general object in view, the invention resides in certain novel features of construction and in unique combinations of parts hereinafter claimed, and fully described by reference to the accompanying drawings wherein: c

Figure 1 is a longitudinal sectional view, partly in elevation, showing the application of the invention to use; and Figs. 2, 3, 4 and 5 are transverse sections as seen along the planes indicated by the lines 2-2, 3-3, Jr-4 and 55 respectively.

In describing the invention, reference will be made to these drawings by similar chara'cters placed on corresponding parts throughout the several views. 7

The numeral 1 indicates a cylindrical head carried by one end of a tubular shaft 2, said head having therein a plurality of radially disposed guide slots 3 which communicate with a central cavity 4:, and in which a number of jaws 5. are slidably mounted, said jaws having beveled inner ends which contact with a cone 6 carried by one end of a rectilinear stem 7 which is provided at its opposite end with screw threads 8 and with an operating handle 9. As clearly shown in the drawings, the stem 7 is disposed rotatably in the tubular shaft 2, which shaft is provided withinternal threads receiving the threads 8. Thus it will be seen, that rotation of the stem by its handle 9', in the proper direction, will cause the jaws 5 to be projected equi-distantly, this being expew dient for centering the tool in a valvecasm in a manner yet to be explained.

, Rotatably surrounding the tubular shaft 2 adjacent the inner end of the head 1, is a cutter head 10 having in one side a radially disposed slot in which an appropriate cutter 11 is held by a .set screw 12 or the equivalent thereof. The end of the head 10. remote from the head 1, is provided withan internally threaded socket 13'into which-one "end of a tubular driving shaft 14 isthreaded, this shaft being disposed around the tubular shaft 2 and being spaced therefrom at its opposite ends by bushings 15 which serve to as bearings to allow the shaft 14 to rotate in respect to the shaft 2, whereby the head 10 i Y may be rotated to move its cutter 11 HPOILE, circular path. For so rotating the shaft ld, the end thereof remote from the head 10 is preferably provided with a ratchet 16 engaged by a spring pressed pawl 17 carried by an oscillator lever 18, said lever bein extended latera ly in respect to the' sha and having appropriate bearings 19 which loosely surround said shaft on opposite sides of the aforesaid ratchet.

Slidable longitudinally upon the shaft 14, is a sleeve 20 having at one end-an outstand-' ing annular flange 21, while its other end is' split at intervals as disclosed at 22 and is 1 beveled at 23 for contact with an internal bevel 24 on a clamping nut 25, the latter being threaded upon the split end of the sleeve, whereby tightening of said nut will frictionally lock said sleeve upon the shaft 14, whereas, when the nut is loosened, the sleeve may be adjusted upon said shaft.

Spaced from the outstanding annular flange 21 is a collar 26, both said flange and said collar being shown in the present embodiment of the invention as having ball races receiving therein ball bearings 28 which also travel in similar races formed in the oiposite ends of a tubular externally threa ed bearing member 29, such member being here shown as threaded through an opening 30 in the center of a transverse anchor bar 31 having in its opposite ends elongated slots 32 for a purpose to be defined.

The invention may be applied for truing or reshaping the valve seats of a number of types of valve casings, but in order to disclose the operation of the device, the illustration of but one type of casing is necessary, such casing being designated by C in Fig. 1. The casing C is provided at one end r valves proper in casings of this class often become so worn as to prevent proper operation thereof, but that the seats of such valves likewise become defective and thus often need reshaping. it is for the attainment of this end, that the invention is designed,

In applying the device to use, the cover plate of the casing is removed and the end of the tool. carrying the heads 1 and 10 is inserted into the casing until the former is disposed n the neck N, and the cutter 11 of the head 10 rests on the seat S. The handle 9 is now. rotated to shift the stem 7 in the tubular shaft 2, until the jaws 5 contact with the aforesaid neck, whereupon. the device will be correctly centered in re spect to the seat. Bolts, screws or the like 33 are now passed through the slots 32 in the anchor bar 31 to brace the tool against vibration, the nut 25 is tightened to clamp the sleeve 23 upon the tubular driving shaft 14-, and the lever 18 is either rotated or os cillated, to cause the cutter 11 to operate upon the seat S, such cutter being new fed toward the seat by proper rotation. of the externally threaded bearing member 29 until the reshaping operation is completed.

From the foregoing description, taken in connection with the accompanying drawings, it will be evident that although a simple and inexpensive construction has been provided for the attainment of the desired re sults, the invention will be highly efficient and durable and will possess a number of advantageous characteristics,

in the drawings, certain specific details of construction have been shown for accomplishing probably the best results, and in the preceding description, such details have been described, but it will be evident that I need not be restricted thereto otherwise than to the extent to which the append.- ed claims limit me.

I claim:

1. A tool of the class described comprising an-anchor member having an opening, a tubular bearing threaded adjustably in said opening, a tubular clamp rotatably mounted in the bearing, and a shaft gripped in said tubular clamp and having at one end a cutter, and at its opposite end. an. operating handle.

2. A tool of the class described comprising'an anchor member having an opening, a tubular bearing threaded adjustably in said opening, a sleeve rotatably mounted in the bearing and having at one end an outstanding fiange disposed adjacent one end. of said bearing, a collar on said sleeve ad.- jacent the other end of said bearing, the other end of said sleeve being beveled and. slit at intervals, a nut threaded on this end of the sleeve and having an internal. bevel for contact with the bevel thereof, and a shaft gripped in the sleeve and having at one end a cutter and at its other end an operating handle.

3.'A tool of the class described comprisinga head having therein a cavity opening through one of its ends, and a plurality of guide openings radiating from said cavity, a tubular shaft extending from the store said end of the head, a stern threaded in said shaft and having at one end an operating handle, a cone on the other end of the stem disposed in the aforesaid cavity, radially shiftable jaws slidable in the guide openings and having their inner ends dis posed in the path of said cone, a cutter head rotatably mounted on the tubular shaft, a cutter carried by said head, and means for rotating the head.

i. A tool of the class described comprising a head, having therein a cavity opening through one of its ends, and a plurality of guide openings radiating from said cavity, a tubular shaft extending from the aforesaid end of the head, a stem threaded in said shaft and having at one end. an. operating handle, a cone on the other end of the stem disposed in the aforesaid cavity, radially shiftable jaws slidable in the guide openings and having their inner ends disposed in the path of said cone, a cutter head. rotatably mounted on the tubular shaft, a cutter carried by said head, a tubular driving shaft rotatably surrounding the afore said tubular shaft and secured to the cutter head, and means for rotating said driving shaft.

5. A tool of the class described comprising an expansible and contractible centering device, a tubular shaft extending from one end thereof, a stem in said shaft for ex- In testimony whereof I have hereunto set panding and contracting the head, a cutter my hand in presence of two subscrlbmg 10 head rotatably mounted on the aforesaid witnesses.

shaft, a cutter carried by said head a tubular I driving shaft rotatably surrounding the SIGURD HALVDAN JOHNSEN' aforesaid shaft and secured to the cutter Witnesses:

head, and means for rotating said. driving LESTER NORTON,

shaft. ANDREW JOHNSON. 

